PRESSURE-SENSITIVE ADHESIVE SHEET TO BE STUCK TO THE SKIN
A pressure-sensitive adhesive sheet to be stuck to the skin which comprises a support and a pressure-sensitive adhesive layer located on the support, characterized in that the pressure-sensitive adhesive layer is formed by curing a composition containing (A) a polyoxyalkylene polymer having at least one alkenyl group per molecule, (B) a compound having hydrosilyl groups at both ends, (C) a compound having two or more hydrosilyl groups on average per molecule, and (D) a hydrosilylation catalyst. Compared with the existing pressure-sensitive adhesive sheets to be stuck to the skin, the pressure-sensitive adhesive sheet to be stuck to the skin as described above little irritates the skin and can achieve a sufficient pressure-sensitive adhesion force and a long-lasting fixation force to the skin.
1 . A pressure-sensitive adhesive sheet to be stuck to the skin having a support and a pressure-sensitive adhesive layer formed thereon, characterized in that, the pressure-sensitive adhesive layer is prepared by curing an adhesive agent composition containing (A) a polyoxyalkylene polymer having at least one alkenyl group in one molecule, (B) a compound having hydrosilyl groups at both ends, (C) a compound having two or more hydrosilyl groups on average in one molecule, and (D) a hydrosilylation catalyst.
2 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the compound (B) is a compound represented by the following Formula (1):
3 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the compound (B) has a number-average molecular weight of 300 to 4000.
4 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the compound (B) has a refractive index of 1.45 to 1.55 at 25° C.
5 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the compound (B) has a viscosity of 5 to 500 cP at 25° C.
6 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the polyoxyalkylene polymer (A) has a number-average molecular weight of 3000 to 50000.
7 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the main chain of the polyoxyalkylene polymer (A) is polyoxypropylene.
8 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 1 , wherein the adhesive layer is prepared by curing an adhesive agent composition having a ratio of [total amount of hydrosilyl group in component (B)]/[total amount of alkenyl group in component (A)] in the range of 0.1 to 0.9.
9 . The pressure-sensitive adhesive sheet to be stuck to the skin according to claim 2 , wherein the compound (B) has a number-average molecular weight of 300 to 4000.